From Taegan Goddard's Political Wire:
"If the answer is 'build a fence' I've got two goats on my place in Mississippi. There ain't no fence big enough, high enough, strong enough, that you can keep those goats in that fence.
"Now people are at least as smart as goats. Maybe not as agile. Build a fence. We should have a virtual fence. Now one of the ways I keep those goats in the fence is I electrified them. Once they got popped a couple times they quit trying to jump it."
Read more here.